Safety-gate for elevators.



J. P. HANTKE.

SAFETY GATE FOR ELEVATORS.

APPLICATION FILED AUG.6,1913.

1,10'Y,608, Patented Aug.18,1914.

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J. F. HANTKB. SAFETY GATE FOR ELEVATORS. APPLICATION FILED AUG.,6, 1913. 1,107, 0 Patented Aug. 18, 1914,

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J. F. HANTKE.

SAFETY GATE FOR ELEVATORS. APPLICATION FILED AUG.6, 1913. 1,107,608. Patented Aug. 18, 19M,

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' SAFETY-GATE FOR ELEVATORS.

Specification of Letters Patent.

Patented Aug. 18, 1914.

Application filed August 6, 1913. Serial No. 783,324.

To all whom it may concern:

Be it known that I, JOHN F. HANTKE, a citizen'of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented new and useful Improvements in Safety-Gates for Elevators, of whichthe following is a specification. v

This invention relates to safety gates for elevators, and the principal object is to provide means for closing an elevator gate from any one of a number of floors so that the elevator may be operated to reach the floor desired.

It is also anobject to provide a safety elevator gate that will automatically shut off e power so that the elevator can not be operated while any one of the gates is open.

It is a further object to provide a safety gate only one of which may be open ata time and that only when the elevator floor registers with the floor adjacent the open ate. g In the drawings accompanying this specification and forming therewith the applica tion for Letters Patent: Figure 1 is a view of the inside of an elevator shaft embodying more than one doorway, showing the invention applied thereto. Fig. 2 is an enlarged detail view of the gate lock showing the electrical switch in elevation. Fig. 3 is a side view of the gate lock cam and the lock. Fig. 4 is a detail in elevation of the gate supporting lock. Fig. 5 is an end vlew thereof, the top of the gate being shown in section. Fig. 6 is a modification of the gate supporting lock, showing means for electrically controlling the latter. Fig. 7 is a diagrammatic view showing the method of operating the gate supporting locks by means of a line. Fig. 8 is a diagrammatic method of operating the same by electrical means controlled by push buttons or switches.

More especially in the drawin s, 10 designates the wall of a building orming the doorway ortion of the elevator shaft provided' wit a series of doorways, the upper of which is designated 11, and the next succeeding doorway 12. Mounted adjacent the doorwa s are a pair of slides 14 and 15 vertically isposed and preferably on the inside of the door jamb on which the gate 16 is adapted to slide, these rods 14 and 15 being supported by suitable brackets 17 on the wall so that the slide portion is spaced the on either side of proper distance away from the vide for the vertical movement of the gate. The upper bar of the gate is extended on either side and supports the eye 18 to which is secured a flexible line 19 carried over a sheave 20, the opposite free end of the line being secured to a balance weight 21. Duplicates of these balancing means are rovided the gate, the weig 1t being such that the gate will not be lifted thereby, but will drop automatically when released.

The lower bar of" the gate is extended to one side and provided with a strike 22, which is engaged by a latch 23 which is slidably supported in a frame 24 secured to the-wall 10. This latch has a stud 25 pro jecting therefrom that supports a friction wheel 26 which is adapted to be engaged by means of the cam 27 rigidly mounted on the floor 28 of the elevator cage. This cam is rigidly supported, as stated, by means of a bracket 29 placed adjacent the slide 30 in the floor to provide mcansfor passing the wheel 26. The action of the cam is to compress the spring 31 mounted on the stem 32 of the latch 23, the parts being so disposed that when the elevator cage registers opposite the floor, the latch 23 is pushed from engagement with the strike 22 on the gate and the latter may be lifted.

In the lifting operation a finger 34 securedto the sides 0 the gate 16 releases a finger 35 on the arm 36 which is ivoted at the point 37 and carries the kni e blade switch 38. This switch is under tension of a spring 39 which normally tends to open the switch to break the circuit in the wires 40 and 41, which are connected to the spring contacts 42 and 43,- respectively, but to insure this action a second finger 44 on the insulated portion of the lever 36 is rovided, which will be positively tripped y the finger 34 in its upward movement should the spring fail to act.

Mounted on the top bar of the gate 16 is a strike 46 which has an inclined face 47 which engages with a spring operated latch and forces the latter inwardly against. the action of the spring 49 mounted on the stem 50 of the latch. This latch is supported on a suitable plate 51 on the wall above the doorway and allows the gate to be locked in its upper osition. To release this latch a pivoted be 1 crank lever 52 is provided, the oppositely disposed arm 53 of this lever having a cord 54 attached thereto, the first arm 52 wall to proon are] being of such length that it engages with a notch cut in the latch 4:8 and the movement of the bell crank on its Pivot 55, will throw the latch and release the gate by disengagement from the strike 46.

Each doorway is provided with a duplicate supporting latch 48 and each cord 54 therefrom is laid over pulleys 55 and 56 to a vertically disposed line 57 which is convenient position to be operated by hand. in case it should be desired to operate this supporting latch electrically so that thepush button or switch at each floor could be used, the mechanism shown in Figs. 6 and 8 is used, the bell crank lever in this case having its dependent arm 60 engaging with the latch 61, the horizontally disposed arm extending on either side of rearwardly disposed arm 63 having a spring or attached thereto, this arm being adapted to be engaged by a latch 65 connected to the solenoid core 66 and the solenoid 67; The latch 65 is under the tension of a spring 68 normally tending to withdraw the core and engage the latch in such position that when the gate 16 is lifted and the strike is locked hy-the latch 61 the parts will be locked in the position shown in Fig. 6 with the forward arm 7 O of the latch lever closing the contact fingers 71 and 7 2, which closes the circuit of the solenoid 67. By closing the switch 73 in the electrical conductor 74: the solenoid 67 is energized from the battery 75, the core 66 is drawn within the solenoid releasing the catch 65 and the arm 60 trips the latch 61 under the influence of the spring 64:. This movement causes the arm to close the spring contacts 76 and W so that the solenoid is cut out of the circuit formed by the conductors 78 and 7 9. It will thus be seen that, by closing the switches or push buttons 73, 80 and 81 on any one of the floors, the solenoid at the second floor will be operated to release the open gate to this floor and the elevator ma then be raised or lowered to the desired starting apparatus not shown.

The conductors 40 and 41 are shown connected to the motor 86, it being understood that any number of the. devices shown may be interposed in a line 40 in series so opening of any switch 38 opposite any doorway will cut out the motor and prevent the operation of the elevator.

What ll claim is:

1. The combination able gate adapted to open disposed somewhat to one side of the doorways and in said openings,

the pivot 62, the

oor by the proper' that the g of a vertically slidand close an opening leading into an elevator shaft,

weights for balancing the gateof slightly less weight than the gate, means operated by the gate for controlling the motive power of an elevator in. the shaft by which the elevator can be operated only when the gate 18 caused to close,-and means by which the gate can be closed from a remote point independent of theelevator to permit the operation of the elevator.

2. The combination of an elevator shaft having a plurality of door openings therein, vertically slidable gates normally closing counter-weights of slightly less weight than the gates connected thereto, means controlled by the gates, whereby the elevator in the shaft can be operated only when all the gates are caused to close, and means by which any open gate may be close from any of the elevator shaft openings independent of the position of the elevator to permit theoperation of the elevator.

3. The combination with an elevator haft having a series of door openings arranged on superposedfioor levels, a normally closed vertically slidable gate extending across each of the shaft openings, a counter-weight for each gate of slightly less weight than the gate, means for supporting each gate in an elevated or open position, means whereby the opening of the gate will prevent the operation of an elevator in the shaft, and means for operating the gate-supporting means from any of the elevator shaft openings, wherebyany open gate will be released and caused to gravitate to its closed position.

4t. llhe combination with an elevator shaft having a series of door openings arranged on superpose floor levels, a normally closed vertically slidable gate extending across each of the shaft openings, a counter-weight for each gate of slightly less weight than the gate, means for supporting each gate in an elevated or open position, means whereby the opening of the gate will prevent the operation of an elevator in the shaft,"means for operating the gate-supporting means from any of the elevator shaft openings, whereby any open gate will be released and I caused to gravltate to its closed position, and

means for locking the gate in it closed position.

In witness that l claim the foregoing l have hereunto subscribed my name this 7 day of July, 1913.

JOHN F. HANTKE.

Witnesses:

Jae. BELL, W. P. Kenna. 

